Combined steam-hammer and forging-press.



T. E. HOLMES.

COMBINED STEAM HAMMER AND FORGING PRESS. APPLICATION FILED FEB. 14. m4. RENEWED APR. 18.1918.

Patented Aug. 13, 1918.

2 SHEETS-SHEET I.

IN V E NTO n T. E. HOLMES.

COMBINED STEAM HAMMER AND FORGiNG PRESS. APPLICATION FILED FEB. 14.1914. RENEWED APR. 18.19MB.

1,275,688. Patentedl Aug. 13, 1918.

2 SHEETS-SHEET 2.

. STAWENT OFFICE? rnoiuns EDMUND HOLMES, or NETHEREIDGE, SHEFFIELD, ENGLAND, ASSIG-NOR 'ro THE UNITED ENGINEERING & FOUNDRY COMPANY, or PITTSBURGH, PENNSYL- VANIA, A. conPoRArIoN or PENNSYLVANIA.

COMBINED STEAM-HAMMER FORGING-PBESS.

intense.

Specification of Letters Patent. '4 Patented Aug. 13, 1918..

Application filed February 14, 1914, Serial No. 818,750. Renewed April 18, 1918. Serial No. 229,417.

To all'whom it may concern:

Be it lmown that I, THoMAs E MUND HOLMES, a subject of the King of England, and resident of Nether Edge,- in the city of Sheffield, England, have invented a new and useful Improvement in Combined Steam Hammers and Forging-Presses? and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to a combined hammer and forging-press.

( The object of my invention is to provide a machine adapted for forging metal on the principle set forth in my United States Letters Patent No. 813,209, in which the forging is accomplished by the employment of a steam-intensifier, and at the same time a vmachine which may be quickly transformed into a steam-hammer by means of which blowsmay be administered to the metal in steamquick'succession in the manner characteristic of such steam-hammers.

To these ends, my invention comprises the novel features hereinafter set forth and claimed.

In the accompanying drawings,,Figure l is a vertical elevation of my improved machine; Fig. 2 is a vertical section of the hammer or forging-press proper; and Fig. 3 is a sectional view of valve controlling the I supply of motive fluid to the lifting cylinder.

In the drawing, the numeral 2 designates a suitable cast-steel frame which carries the hydraulic pressure-cylinder 3 within which operates the ram 4. The ram 1* is forced downward by fluid pressure introduced by means of the pipe 5. The smaller diameter of the ram 4 extends up through the. hydraulic pressure cylinder 3, a suitable .stufling box being provided in said cylinder. The fluid pressure employed, may be derived from a pum accumulator system, or from a steamintensifier system, such as illustrated and described in my prior United States Patents Nos. 813,209 and 898,365. In the resent case I have illustrated'in Fig. 1 of thedrawings,a.steam-intensifier system for supplying fluid-pressure to the pipe 5, and this intensifier system is the same, or substanprior Patent No. 898,365, and I do not deem it necessary to refer to and describe in detail the ,parts included in said steam-intensifier system, other than that the steam-cylinder 6 has a piston therein, which is connected up to steam to be cut off in accordance with the the ram 7, which works in the cylinder 8. The admlssion andexhaust of steam in cylinder 6 is controlled by suitable Valves connected up by links and levers to the operating lever 9, the movement of the piston in the steam-cylinder 6 of the intensifier, being automatically controlled in such manner that the movement of said piston in performing its working stroke, will cause the supply of cylinder 14 is the piston 16, to which is attached the piston-rod 17. This piston rod 17 extends down through a bored hole in the ram 4:, and is rigidly keyed-to the toolholder 10, as illustrated in Fig. 2. The pipe 18 connects with the upper end of the liftpoint above the. piston 16, for lowering said piston, and a pipe 19 is connected with the lower end of said lifting-cylinder 14 for adin'g-cylinder 14 to admit air or steam to a.

mitting the motive fluid for raising the piston 16. The pipes 18 and 19 are connected up to the four-way valve 20'illustrated in detail in Fig. 3. The piston valve 21 controls the ports leading to the pipes 18 and 19 and also bring said pipes into connection with the exhaust-pipe 22. The steam or other motive-fluid for operating the liftingcylinder 14 is supplied by the pipe 23, which @5 "is connected up to the 4-way valve 20 and in order to throttle or shut ofl the supply of steam or other fluid from the pipe 23, a plugvalve 24 is provided, which is operated by the hand lever 25.

The pipe 23 is connected up with a suitable 3-way valve 26. This valve 26 is connectedup with the motive-fluid supply and may be operated by the lever 9 in a manner similar tially the same, as that illustratedin my to the way of] operating a like valve in my said prior Patent No. 898,365.

27 connected thereto, passing through the guide 28. Pivoted to the'lower end of the stem 27 is the swinging-sleeve 29. A lever The piston-valve 21 has the rod or stem i 30 is pivotally connected to the tool-holder L and said lever is in sliding engagement with the sleeve 29. A link'31 is connected with sleeve 29 and short arm 32 of the lever 33. A key 40 passes-through an opening in the frame 2 and said key engaged with its inner end 41 the collar 42 on the ram 4 and retains said ram in its elevated position when the 10 machine is employed as a steam-hammer. To

tem

said valve remaining stationary during the time that the machine is being used as'a forging-press. The key 40 is released from the collar 42 of the ram 4. By moving the hand-lever 9, the steam is admitted to the steam-cylinder 6 of the intensifier and the high ressure water is admitted to the systlirough the pipe 5,-and acts to lower the ram 4, together with the tool, to perform the forging operation. The valve 26 pro-' vides a cushion of live steam in the cylinder 14, which gives s eed of operation, and lifts the upper tool a er each downward movement of the press. During this forging op-.-

eration, the lever 30 has no effect on the valve 20 when the lever 33 is in neutral position, as indicated in Fig. 1. A

When, however, the machine is to be used as a hammer, the lever 9 is placed in neutral.

position and securedby means of a pinor other device), The key is turned-to lock the ram 4-in itselevated position. The valve 26 is set to connect thesupply-pipe 23 with the air or steam-supply.- Assuming that the press-head 10 and the piston '16 are at the top of their stroke and the valve 20 is in such position that steam or air is admitted to the lower end of cylinder 14, to hold said 4 press-head: and I iston in this position, the

and-lever 33 is orced down, which will operate the piston valve 21 so as to admit steam to the upper end of cylinder 14- through the pipe.18, while the pipe 19 is 0 en to the exhaust 22. This will cause the piston 16, together with the pistonrod 17, and tool-holder 10 to descend upon the work supported on the. lowerdie 13, in sucha manner as to strike a hammer blow upon the work, as distinguished from the pressing action of the upper die when the machine is used ,asa for ing-press. As the toolholder 10 descend s, the pivoted end of the lever 30 will be carried along" and if the hand-lever 33 i'sheld stationary in the posi- ,tion to which it has been moved, it will be observed that the piston-valve 21 will be reversed through the action of the link 31,

so as toadmit steam to the lower end of the cylinder 14, so forming a steam. cushion,

- and at the same time again raising the toolholder 10, preparatory to striking another that combines the forging-press and steamhammer in a compact-simpleform, by means of which I am enabled to'secure all of the advantages of the forging-press operating under the steam-intensifier system, together with all of the advantages which go with such a forging press in certain lines of Work, and at the same time am enabled to transform the-machine quickly into'a steam-hammer, where, for certain kinds of work, the steam-hammer may be found desirable.

What I claim is: 1.; A machine of the' character described, comprising a suitable frame, a lower die, a tool-holder, a cylinder, a ram in said cylinder above and n line with said tool-holder saidram having a reduced portion extending out of and above said cylinder, a cylinder above and in line with said first-named cylinder, a piston in said last-named cylinder, a' piston rod extending down through saidram, connections between said piston rod and said tool-holder, and a releasable support for "said ram for holding same in its elevated position, means for supplying motive fluid alternately to op osite ends of said second-named cylinder w ereby said toolholder may be raised and lowered independently of said ram: 4

2. In a machine of the character described, .com rising a suitable frame, a lower die, a

der in line with said tool-holder,' said ram having a reduced portion extending throu h the upper end of said cylinder, me ns or --su.pply1ng fiuid'pressure to said cyl" der, a

lifting cylinder, a piston therein, a piston rod connected to said piston passing down through saidram and connected to said toolholder, means for supplying motive fluid toololder, a cylinder, a ram in said cylinalternately to opposite ends of said lifting" cylinder, and a key in said frame adapte to engage saidram in its elevated posi-' tion whereby said tool holder may be moved up and down independently of said ram.

In testimony whereof, I the said THOMAS EDMUND HoLMns have hereunto set my hand. THOMAS 'EDMUND HOLMES. A Witnesses: f

LUTHER J. Pane, RICE K. EVANS. 

